Chromatite

chromatite

vaterite

portlandite

aragonite

Images

Formula: CaCrO₄
Anhydrous chromate
Crystal System: Tetragonal
Specific gravity: 3.142 calculated
Streak: Yellow
Colour: Yellow, violet
Environments

Sedimentary environments

Chromatite is formed in an arid climate along fractures in limestone and marl by ascending ground water; the chromium is derived from underlying bituminous phosphatic marl. Associated minerals include gypsum, calcite, aragonite, vaterite and portlandite (HOM).

Localities

At the type locality, Ma'ale Adumim, Quds Governorate, West Bank, Palestine, chromatite occurs in sedimentary rock units associated with gypsum and calcite (AM 49.439, Mindat).

Back to Minerals